TY - JOUR T1 - A spatial productivity index in the presence of efficiency spillovers: Evidence for U.S. banks, 1992鈥�2015 JO - European Journal of Operational Research PY - 2019/03/16 AU - Glass AJ AU - Kenjegalieva K ED - DO - DOI: 10.1016/j.ejor.2018.09.011 PB - Elsevier BV VL - 273 IS - 3 SP - 1165 EP - 1179 Y2 - 2025/05/24 ER -